INDEX 



575 



Protoplasm, 4, 7, 8, 9, 10 

 Protoplasm, chemical elements, 9 

 Protoplasm, properties, 8 

 Protoplasm, structure of, 7 

 Protozoa, 17, 21-46; characteristics, 21; 



economic importance, 46 

 Proventriculus of birds, 359 

 Przibram, 539 

 Pseudopodia, of Hydra, 57 

 Pseudopodia, of protozoa, 7, 22 

 Psittaci, 349 

 Psychic cells, 469 

 Ptarmigans, 344 

 Ptyalin, 429 

 Puff adder, 320 

 Puffer fish, 248 

 Pulse, 453 



Pulse frequency, Glaser, 498 

 Puma, 380 



Purple death adder, 319 

 Purple martins, 354 

 Pycnogonida, 203 

 Pygopodes, 337 

 Pyloric cecae, 256 

 Pyloric ceca, starfish, 132 

 Pyloric sphincter, 430 

 Pyloric stomach, starfish, 132 

 Pyralidina, 186 

 Pyramidal cells, 469 

 Python, 314 



QUAGGA, 400 

 Quanta in biology, 539 



RABBITS, 395, 494 



Rabies, 45 



Raccoon, 383 



Race mixture and the evolution of man, 



418 

 Races of man, 417 

 Radial nerve of starfish, 135 

 Radiolaria, 25 

 Radula, of gastropods, 158 

 Rails, 34I 

 Rana goliath, 273 

 Rana pipiens, 273-291 

 Rand, H. W., spiracles, 231 

 Ranidae, 271 



Ratitae, 334, 336 



Rat-tailed larva, 193 



Rattle of the rattlesnake, 327 



Rattler preparing to strike, 324 



Ray, J., 512 



Rays, 229 



Rectal ceca of birds, 360, 361 



Rectal gland, 231 



Rectigrade, 423 



Rectum, earthworm, 109 



Rectum of birds, 360 



Red ant, 197 



Red coral, 64 



Red fox, 387 



Red-bellied terrapin, 305 



Red-headed woodpecker, 350 



Redi, I 



Red kangaroo, 376 



Red mite, 201 



Red pocket gopher, 395 



Red sponge, 48 



Red squirrel, 391 



Red wolf, 388 



Reduction division and sex determination, 



508 

 References on animal coloration, 489; 



animal relationships, 487; birds, 369; 



bird songs, 363; endocrines, 449; 



ruminant stomach, 434 

 Reflex arc, 478 

 Reflex action, 479 

 Regal python, 314 

 Regeneration in Annelida, 119 

 Regeneration in Hydra, 68 

 Regeneration in Planaria, 83 

 Remoras, 247 



Renal portal system of skate, 234 

 P.ennin, 431 



Reproductive system, cat, 462 

 Reproductive system of birds, 363, 364 

 Reproductive system of lobster, 166 

 Reproductive system of reptilia, 327 

 Resistance of amphibia to poisons, 301 

 Respiration, amphibian, 285; cat, 460; 



fish, 253; insect, 206; bird, 362; lobster, 



166; reptile, 326 

 Reticulum, 433 

 Reticular theory, 8 



